JPS6220688Y2 - - Google Patents
Info
- Publication number
- JPS6220688Y2 JPS6220688Y2 JP1980104058U JP10405880U JPS6220688Y2 JP S6220688 Y2 JPS6220688 Y2 JP S6220688Y2 JP 1980104058 U JP1980104058 U JP 1980104058U JP 10405880 U JP10405880 U JP 10405880U JP S6220688 Y2 JPS6220688 Y2 JP S6220688Y2
- Authority
- JP
- Japan
- Prior art keywords
- cylinder block
- bearing cap
- mounting
- skirt
- ribs
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 230000003014 reinforcing effect Effects 0.000 claims description 17
- 230000000694 effects Effects 0.000 description 5
- 230000010349 pulsation Effects 0.000 description 3
- 238000013016 damping Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Landscapes
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Description
【考案の詳細な説明】
本考案はベアリングキヤツプの側部に垂設され
たリブ間に補強ステーを跨設することを基本とし
てレシプロ機関の振動を抑止しうるレシプロ機関
のシリンダブロツクに関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cylinder block for a reciprocating engine that can suppress vibrations of the reciprocating engine based on a reinforcing stay straddled between ribs vertically provided on the side of a bearing cap.
ガソリンエンジン、デイーゼルエンジン等のレ
シプロ機関では、シリンダでの爆発およびクラン
クシヤフトの回転に伴なう不均合荷重等の影響に
よつて、そのシリンダブロツクには例えば第７図
に誇張して示すごとく、シリンダａ…ごとの振動
ｂとともに、シリンダブロツク全体に弦状の脈動
ｃが生じることが多く、かかる振動、脈動はエン
ジン騒音の原因となる。又この振動、脈動は車輌
の軽量化のために、シリンダブロツクを薄肉化す
るに従がい増大する。かかる問題を解決するた
め、例えば第８図に示すごとき、ベアリングキヤ
ツプの取付部ｄと、シリンダブロツクｅのスカー
ト部ｆとを、別個もしくは一体に形成した補強ス
テーｇにより結合する装置が特開昭53−60416号
公報により提案されているが、このものは、ベア
リングキヤツプの取付部ｄとスカート部ｆとを同
時に固定するために、極めて高い加工精度が要求
され又組立に多大の工数を要する他、その実施例
図に明示するごとくスカート部ｆに取付ボルト挿
通用の、外部に通じる側孔を設け取付けるもので
あるため、油洩れを完全には防止しえない。さら
に実開昭52−151221号公報は、シリンダブロツク
ｅの剛性を向上する他の構造を開示している（第
９図に示す）。しかし該公報で開示するものは、
ベアリング交換のためにスカート部ｆに開口せし
めた点検窓ｈによる剛性の劣化を補なうことを目
的とし、従つて補強ステーｇはベアリングキヤツ
プｉの下方ではなくて、ベアリングキヤツプｉ間
のクランクケースを跨架するごとく取付けられ、
そのために、シリンダブロツクｅ自体の下端に比
較的長い内フランジｊを設けるとともに、バラン
スウエイト等との衝合防止のためスカート部ｆを
ベアリング軸芯の下方に延長する必要があり、そ
の結果シリンダブロツクの重量が著増し又所要の
オイルパンを取付ける際にはエンジン全高は大と
ならざるをえなかつた。 In reciprocating engines such as gasoline engines and diesel engines, due to the effects of explosions in the cylinders and unbalanced loads caused by the rotation of the crankshaft, the cylinder block is affected by the effects of the cylinder block, as shown exaggeratedly in Figure 7. , cylinder a..., chordal pulsation c often occurs throughout the cylinder block, and such vibrations and pulsations cause engine noise. Furthermore, these vibrations and pulsations increase as the cylinder block is made thinner in order to reduce the weight of the vehicle. In order to solve this problem, for example, as shown in FIG. 8, a device was proposed in Japanese Patent Application Laid-Open No. 2003-100001, which connects the mounting portion d of the bearing cap and the skirt portion f of the cylinder block e by means of a reinforcing stay g formed separately or integrally. This is proposed in Japanese Patent No. 53-60416, but this requires extremely high machining accuracy and requires a large number of man-hours for assembly in order to simultaneously fix the bearing cap mounting part d and skirt part f. As clearly shown in the embodiment drawings, since the skirt portion f is provided with a side hole leading to the outside through which the mounting bolt is inserted, oil leakage cannot be completely prevented. Further, Japanese Utility Model Application No. 52-151221 discloses another structure for improving the rigidity of the cylinder block e (as shown in FIG. 9). However, what is disclosed in this bulletin is
The purpose is to compensate for the deterioration in rigidity due to the inspection window h opened in the skirt part f for bearing replacement, and therefore the reinforcing stay g is placed in the crankcase between the bearing caps i instead of below the bearing caps i. It is installed as if straddling the
For this purpose, it is necessary to provide a relatively long inner flange j at the lower end of the cylinder block e itself, and to extend the skirt part f below the bearing axis to prevent collision with a balance weight, etc., and as a result, the cylinder block The weight of the engine increased significantly, and the overall height of the engine had to increase when installing the required oil pan.
本考案は補強リブをベアリングキヤツプに近接
してその両側に垂設する一方、該リブ自体の下端
を補正ステーにより結合することを基本として、
従来構造の前記問題点を解決し、スカート部を無
為に長くすることもなく、簡易に生産しえる剛性
の大なるレシプロ機関のシリングブロツクの提供
を目的とし、以下その一実施例を図面により詳細
に説明する。 The present invention is based on the fact that reinforcing ribs are vertically installed on both sides of the bearing cap, and the lower ends of the ribs themselves are connected by correction stays.
The purpose of the present invention is to solve the above-mentioned problems of the conventional structure and to provide a silling block for a reciprocating engine with high rigidity that can be easily produced without unnecessarily lengthening the skirt part, and one embodiment thereof will be described in detail below with reference to drawings. Explain.
第１〜２図は、本考案のレシプロ機関のシリン
ダブロツクが４気筒のエンジンに採用されたその
一実施例を示す。図においてシリンダブロツク２
は、シリンダ部３と、その下端のクランクケース
部４とを有し、クランクケース部４は前壁６、後
壁７の間をスカート部５により連結するととも
に、前壁６および後壁７に設けられる第１、第５
のベアリング９ａ，９ｅおよびその間に等間隔に
配設される。第２〜第４のベアリング９ｂ，９
ｃ，９ｄにより、クランクシヤフトのジヤーナル
部を枢支する。各ベアリング９ａ〜９ｅは、ベア
リングキヤツプ１３ａ〜１３ｅと該ベアリングキ
ヤツプ１３ａ〜１３ｅの取付部１０ａ〜１０ｅと
の間で挾持されるとともに、各取付部１０ａ〜１
０ｅには、該取付部１０ａ〜１０ｅから、その下
面の切削逃げ代となる小間隔１１を隔てた位置
に、最小の鋳物勾配にてその両側にリブ１２，１
２が垂設される。従つてリブ１２，１２は、略矩
形板状を呈するとともに前記取付部１０ａ〜１０
ｅに取着されたベアリングキヤツプ１３ａ〜１３
ｅにその内側縁が近接する。該リブ１２はその外
側縁がスカート部５に連結されかつその下端には
該スカート部５下面と面一な取付面１４を有する
内厚部１５が形成されている。なお取付面１４、
従つて肉厚部１５の厚さは、第１図からわかるよ
うに、前記取付部１０ａ〜１０ｅと略同巾に形成
される。又スカート部５はベアリングキヤツプ１
３ａ〜１３ｅの最下端から下方に突出するととも
に、リブ１２の取付面１４にはその対向端縁近傍
に螺孔１９が穿孔され該螺孔１９を用いて鋼製の
寸切材からなる補強ステー２０がベアリングキヤ
ツプ１３ａ〜１３ｅ下方を通り取付面１４，１４
間で固定される。なおスカート部５下端にはオイ
ルパン１６取付用の外フランジ１７が設けられ
る。 Figures 1 and 2 show an embodiment in which the cylinder block of the reciprocating engine of the present invention is employed in a four-cylinder engine. In the figure, cylinder block 2
has a cylinder part 3 and a crankcase part 4 at the lower end thereof, and the crankcase part 4 connects a front wall 6 and a rear wall 7 with a skirt part 5, and also connects the front wall 6 and the rear wall 7 with each other. The first and fifth provided
bearings 9a, 9e and are arranged at equal intervals therebetween. Second to fourth bearings 9b, 9
c and 9d pivotally support the journal portion of the crankshaft. Each of the bearings 9a to 9e is held between a bearing cap 13a to 13e and a mounting portion 10a to 10e of the bearing cap 13a to 13e.
0e, ribs 12, 1 are provided on both sides of the mounting portions 10a to 10e with a minimum casting slope at a position apart from the mounting portions 10a to 10e by a small interval 11 which is a cutting allowance on the lower surface thereof.
2 is installed vertically. Therefore, the ribs 12, 12 have a substantially rectangular plate shape, and the mounting portions 10a to 10
Bearing caps 13a to 13 attached to e
Its inner edge is close to e. The outer edge of the rib 12 is connected to the skirt portion 5, and an inner thick portion 15 having a mounting surface 14 flush with the lower surface of the skirt portion 5 is formed at its lower end. In addition, the mounting surface 14,
Therefore, as can be seen from FIG. 1, the thick portion 15 is formed to have approximately the same width as the mounting portions 10a to 10e. Also, the skirt part 5 is the bearing cap 1
3a to 13e, and a screw hole 19 is bored in the mounting surface 14 of the rib 12 near the opposite edge thereof, and the screw hole 19 is used to attach a reinforcing stay made of cut steel material. 20 passes below the bearing caps 13a to 13e and the mounting surfaces 14, 14
fixed between. Note that an outer flange 17 for attaching an oil pan 16 is provided at the lower end of the skirt portion 5.
然して本考案のシリンダブロツクはベアリング
キヤツプ１３ａ〜１３ｅに近接して、垂下するリ
ブ１２，１２を補強ステー２０により補強するも
のであるため、まづリブ１２が略矩形板状となり
剛性の向上に役立つ他、該リブ１２を補強ステー
２０により連結することによつてスカート部５の
剛性をさらに高めシリンダブロツクの防振効果を
著高する。又補強ステー２０の取付長さｌが短か
くなしうるため、従つて補強ステー２０に作用す
る荷重による伸縮量を減じその補強効果を高めう
る。さらにスカート部５下端とリブ１２とを面一
とするときには工作が容易である他、その組立も
極めて簡易化される。 However, in the cylinder block of the present invention, the hanging ribs 12, 12 are reinforced by the reinforcing stays 20 in the vicinity of the bearing caps 13a to 13e, so the ribs 12 have a substantially rectangular plate shape, which helps improve rigidity. In addition, by connecting the ribs 12 with reinforcing stays 20, the rigidity of the skirt portion 5 is further increased and the vibration damping effect of the cylinder block is significantly enhanced. Furthermore, since the installation length l of the reinforcing stay 20 can be shortened, the amount of expansion and contraction due to the load acting on the reinforcing stay 20 can be reduced and the reinforcing effect can be enhanced. Further, when the lower end of the skirt portion 5 and the rib 12 are made flush with each other, not only the machining is easy but also the assembly thereof is extremely simplified.
第４〜６図は、スカート部４下面が、ベアリン
グキヤツプ１３ａ〜１３ｅの下端よりやや上方に
位置するばあいの本考案の他の実施例を示し、補
強ステー２０の中央部に下方への彎曲部２０ａを
設けることによりそれらの衝合が防止されてい
る。又本実施例においては、前記第３のベアリン
グキヤツプ１３ｃの取付部１０ｃにのみ前記矩形
板状のリブ１２が設けられ、第１、第２、第４、
第５のベアリングキヤツプ１３ａ，１３ｂ，１３
ｄ，１３ｅの取付部１０ａ，１０ｂ，１０ｄ，１
０ｅには、スカート部５下端の内縁に連絡する傾
斜した従来の三角状のリブ１２ａが設けられる場
合を示しているが、必要に応じて他の第１，２，
４，５のベアリングキヤツプ取付部１０ａ，１０
ｂ，１０ｄ，１０ｅにもリブ１２を設け、該リブ
１２間を補強用ステー２０で連結してもよいこと
はいうまでもない。 4 to 6 show another embodiment of the present invention in which the lower surface of the skirt portion 4 is located slightly above the lower ends of the bearing caps 13a to 13e, and a downwardly curved portion is provided at the center of the reinforcing stay 20. Providing 20a prevents them from colliding. Further, in this embodiment, the rectangular plate-shaped rib 12 is provided only on the mounting portion 10c of the third bearing cap 13c, and
Fifth bearing cap 13a, 13b, 13
Mounting parts 10a, 10b, 10d, 1 of d, 13e
0e shows a case where a conventional inclined triangular rib 12a communicating with the inner edge of the lower end of the skirt portion 5 is provided, but other first, second, and other ribs may be provided as necessary.
4, 5 bearing cap mounting parts 10a, 10
It goes without saying that ribs 12 may also be provided on b, 10d, and 10e, and the ribs 12 may be connected by reinforcing stays 20.
本実施例のごとく彎曲した補強ステー２０を用
いることにより、ベアリングキヤツプが下方に突
出するときにも本考案のレシプロ機関用のシリン
ダブロツクが採用しうる。又スカート部５の中央
に位置する最も振巾の大きい第３のベアリングキ
ヤツプ１３ｃの取付部１０ｃにのみ補強ステー２
０を設けることにより、加工費の上昇を抑止しつ
つ最も効果的に防振効果を発揮させることができ
る。 By using the curved reinforcing stay 20 as in this embodiment, the cylinder block for a reciprocating engine of the present invention can be used even when the bearing cap protrudes downward. Further, the reinforcing stay 2 is installed only in the attachment part 10c of the third bearing cap 13c, which is located in the center of the skirt part 5 and has the largest amplitude.
By providing 0, it is possible to most effectively exhibit the vibration damping effect while suppressing an increase in processing costs.
叙上のごとく本考案のレシプロ機関用シリンダ
ブロツクは、工作容易にして剛性を向上でき、そ
の防振効果を発揮して騒音の低減に役立ち、デイ
ーゼル機関のシリンダブロツクとしてとくに好適
に採用しうる。なお補強ステーの取付けには適宜
のノツクピンを用いることもでき又切欠部を設け
リブと掛止させることもできる。 As mentioned above, the cylinder block for a reciprocating engine of the present invention is easy to work, has improved rigidity, exhibits a vibration-proofing effect and helps reduce noise, and can be particularly suitably employed as a cylinder block for a diesel engine. Note that an appropriate knock pin may be used to attach the reinforcing stay, or a notch may be provided so that the reinforcing stay is hooked to the rib.
第１図は本考案のレシプロ機関のシリンダブロ
ツクの一実施例を示す縦断面図、第２図はそのＡ
−Ａ線断面図、第３図はリブ下端を示す部分断面
図、第４図は他の実施例を示す縦断面図、第５図
はそのＢ−Ｂ線断面図、第６図はそのＣ−Ｃ線断
面図、第７図はシリンダブロツクの振動を示す平
面図、第８〜９図は従来装置を示す断面図であ
る。
２……シリンダブロツク、５……スカート部、
１０ａ〜１０ｅ……取付部、１２……リブ、１３
ａ〜１３ｅ……ベアリングキヤツプ、１５……肉
厚部、２０……補強ステー。
Fig. 1 is a vertical sectional view showing an embodiment of the cylinder block of the reciprocating engine of the present invention, and Fig.
-A sectional view, FIG. 3 is a partial sectional view showing the lower end of the rib, FIG. 4 is a longitudinal sectional view showing another embodiment, FIG. 5 is a BB sectional view, and FIG. 6 is a C-line sectional view. -C line sectional view, FIG. 7 is a plan view showing the vibration of the cylinder block, and FIGS. 8 and 9 are sectional views showing the conventional device. 2...Cylinder block, 5...Skirt part,
10a-10e...Mounting part, 12...Rib, 13
a to 13e...Bearing cap, 15...Thick wall portion, 20...Reinforcement stay.
Claims (1)
されかつ内側縁がベアリングキヤツプの側面に近
接して垂下するとともに下端に前記ベアリングキ
ヤツプの取付部と略同厚かつ前記スカート部下面
と面一な取付面を有する肉厚部を具えたリブを、
ベアリングキヤツプの両側で前記取付部に連設す
るとともに、該リブを、ベアリングキヤツプの下
方を通りかつ前記取付面に固着される補強ステー
により連結することを特徴とするレシプロ機関の
シリンダブロツク。 The outer edge is connected to the skirt portion of the cylinder block, the inner edge hangs down close to the side surface of the bearing cap, and the lower end has a mounting surface that is approximately the same thickness as the mounting portion of the bearing cap and flush with the lower surface of the skirt. A rib with a thick part having
A cylinder block for a reciprocating engine, characterized in that the cylinder block is connected to the mounting portion on both sides of a bearing cap, and the ribs are connected by a reinforcing stay that passes below the bearing cap and is fixed to the mounting surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1980104058U JPS6220688Y2 (en) | 1980-07-23 | 1980-07-23 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1980104058U JPS6220688Y2 (en) | 1980-07-23 | 1980-07-23 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5728148U JPS5728148U (en) | 1982-02-15 |
| JPS6220688Y2 true JPS6220688Y2 (en) | 1987-05-26 |
Family
ID=29465442
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1980104058U Expired JPS6220688Y2 (en) | 1980-07-23 | 1980-07-23 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6220688Y2 (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5461910U (en) * | 1977-10-11 | 1979-04-28 |
-
1980
- 1980-07-23 JP JP1980104058U patent/JPS6220688Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5728148U (en) | 1982-02-15 |
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